import random
import string

def generate_random_string(length):
    """生成指定长度的随机小写字母字符串"""
    return ''.join(random.choice(string.ascii_lowercase) for _ in range(length))

def generate_test_cases(num_cases, max_length=20):
    """生成测试用例"""
    test_cases = []
    for _ in range(num_cases):
        length = random.randint(1, max_length)
        s = generate_random_string(length)
        test_cases.append(s)
    return test_cases

if __name__ == "__main__":
    # 生成10个测试用例，最大长度为15
    test_cases = generate_test_cases(10, 15)
    for i, case in enumerate(test_cases, 1):
        print(f"Test Case {i}: {case}")